From dc759d5eb3690dc0f38d4520d26f8f10035dfe8d Mon Sep 17 00:00:00 2001
From: Daniele Bariletti <daniele.bariletti@egalware.comm>
Date: Wed, 4 Mar 2026 15:43:16 +0100
Subject: [PATCH] EgtExecutor : - aggiunta funzione per ottenere part e shell
 di una faccia di una trimesh.

---
 EXE_GdbGetSurf.cpp | 14 ++++++++++++++
 LUA_GdbGetSurf.cpp | 22 ++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/EXE_GdbGetSurf.cpp b/EXE_GdbGetSurf.cpp
index ac52675..72905cd 100644
--- a/EXE_GdbGetSurf.cpp
+++ b/EXE_GdbGetSurf.cpp
@@ -374,6 +374,20 @@ ExeSurfTmPartCount( int nId)
    return pStm->GetPartCount() ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeSurfTmGetPartAndShellFromFacet( int nIdSurfTm, int nIdFacet, int& nPart, int& nShell)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, -1)
+  // recupero la superficie trimesh
+   const ISurfTriMesh* pStm = GetSurfTriMesh( pGeomDB->GetGeoObj( nIdSurfTm)) ;
+   if ( pStm == nullptr)
+      return false ;
+  // recupero la parte e la shell a cui appartiene la faccia passata
+   return pStm->GetPartAndShellFromFacet( nIdFacet, nPart, nShell) ;
+}
+
 //-----------------------------------------------------------------------------
 bool
 ExeSurfTmGetVertex( int nId, int nVert, int nRefId, Point3d& ptVert)
diff --git a/LUA_GdbGetSurf.cpp b/LUA_GdbGetSurf.cpp
index 7d3c78f..f710511 100644
--- a/LUA_GdbGetSurf.cpp
+++ b/LUA_GdbGetSurf.cpp
@@ -301,6 +301,27 @@ LuaSurfTmPartCount( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaSurfTmGetPartAndShellFromFacet( lua_State* L)
+{
+   // 2 parametri : Id SurfTm, Id Facet
+   int nIdSurfTm ;
+   LuaCheckParam( L, 1, nIdSurfTm)
+   int nIdFacet ;
+   LuaCheckParam( L, 1, nIdFacet)
+   LuaClearStack( L) ;
+  // recupero il numero di parti della superficie trimesh
+   int nPart = - 1 ;
+   int nShell = - 1 ;
+   ExeSurfTmGetPartAndShellFromFacet( nIdSurfTm, nIdFacet, nPart, nShell) ;
+   if ( nPart >= 0)
+      LuaSetParam( L, nPart) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaSurfTmGetVertex( lua_State* L)
@@ -1299,6 +1320,7 @@ LuaInstallGdbGetSurf( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmVertexCount", LuaSurfTmVertexCount) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmFacetCount", LuaSurfTmFacetCount) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmPartCount", LuaSurfTmPartCount) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmGetPartAndShellFromFacet", LuaSurfTmGetPartAndShellFromFacet) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmGetVertex", LuaSurfTmGetVertex) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmGetNearestVertex", LuaSurfTmGetNearestVertex) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfTmTriangleNormVersor", LuaSurfTmTriangleNormVersor) ;